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| All Patents in class 310/242 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,430,084 | Feb. 25, 1969 | G.D. Hall, R.H. Huber, R.W. Wagner | Electric motor and brush assembly for a portable tool | handheld power tools | |
| 3,652,879 | Mar. 28, 1972 | L.E. Plunkett, S.C. Rees | Electric power tool | handheld power drills | |
| 3,656,016 | Apr. 11, 1972 | H.R. Botefuhr, A. Jacyno | Subframe for power tool having double insulated brush holders | handheld power tools | |